Unveiling the Universe: Understanding the Composition of Our Cosmos

[wolram]

So far i know that------26.8% is dark mater, 68.3% is dark energy and 4.9% is normal matter.

what is meant by [normal matter] and what is the proportion of luminous matter.

 

[mfb]

The cosmic energy inventory has a detailed list of those contributions. It was written before the Planck collaboration published results, but that should just give small changes.

 

[bapowell]

From wikipedia: "Ordinary matter is divided into luminous matter (the stars and luminous gases and 0.005% radiation) and nonluminous matter (intergalactic gas and about 0.1% neutrinos and 0.04% supermassive black holes)." Luminous matter makes up about 10% of ordinary matter. Ref: http://en.wikipedia.org/wiki/Matter

 

[wolram]

Is this correct, only 0.045% of the universe is baryons?

 

[phyzguy]

Is this correct, only 0.045% of the universe is baryons?

Yes, I believe that's correct. I think Planck gives 4.9%, but that's just a quibble.

 

[bapowell]

Is this correct, only 0.045% of the universe is baryons?

About 4.5% is atoms (baryons)...are you off by a factor of 100 accidentally?

 

[wolram]

My mistake, i have looked again and it is in deed 4.5%.

Thanks.